Week-by-week planner

Lays out the first 12 or 20 weeks from your first injection on the Wegovy, Zepbound, Ozempic or Mounjaro label schedule, marks every step up and steady-state point, and pairs each week with what the label and the pivotal trial say about that stretch, with sources. Exports to your calendar. Never chooses a dose.

By FormBlends editorial teamAssumptions checked September 4, 2026Runs in your browser; nothing is sent to a server

Inputs

Date of the first injection

The planner counts weekly from this day. It does not know your prescription; it lays out the label schedule.

Label schedule

How far to plan

0.25 mg once weekly for weeks 1 to 4, then 0.5 mg (weeks 5 to 8), 1 mg (weeks 9 to 12), 1.7 mg (weeks 13 to 16), then 2.4 mg maintenance from week 17. The label allows delaying an increase by 4 weeks if a step is not tolerated.

Your weeks

Pick a start date and a label schedule. You get a dated row for every week: the label dose for that week, where you are in escalation, what the label and the pivotal trial say about that stretch, and one thing to do. Nothing here replaces the dose on your prescription.

Formulashown in full, nothing hidden

date(week n)     = start date + 7 x (n - 1) days        (UTC calendar days, no DST drift)
dose(week n)     = label step containing week n; each label step is 4 weeks at minimum
weeks beyond the last label step continue at the last dose (maintenance or maximum)
week-at-dose     = 1 on the first injection of a step, then +1 per week
steady state     = week-at-dose reaches 4 (tirzepatide) or 5 (semaglutide), per label section 12.3
phase            = first-dose | initiation | step-up | escalation | last label step

Expectation text is keyed by phase and molecule and quotes the label section or trial figure it comes from. The planner has no model of your body; it only reads the calendar and the labels.

Assumptions, checked September 4, 2026

Wegovy: 0.25, 0.5, 1, 1.7 mg for 4 weeks each, then 2.4 mg (section 2.1). Steady state 4 to 5 weeks; peak 1 to 3 days after a dose (section 12.3).
Zepbound and Mounjaro: 2.5 mg for 4 weeks, then 5 mg; further 2.5 mg steps after at least 4 weeks each, maximum 15 mg (section 2.1). Steady state 4 weeks; peak 8 to 72 hours (section 12.3).
Ozempic: 0.25 mg for 4 weeks, then 0.5 mg; optional increases to 1 mg and 2 mg after at least 4 weeks each (section 2.1).
The weight-change statements refer to the published curves in STEP 1 (68 weeks, semaglutide 2.4 mg, PubMed 33567185) and SURMOUNT-1 (72 weeks, tirzepatide 5, 10 and 15 mg, PubMed 35658024). They are population averages read from Figure 1 of each paper, not predictions for you.
Compounded semaglutide and tirzepatide have no FDA label. If you were prescribed a compounded product, use the schedule your prescriber wrote; this planner shows the brand label schedule only. Compounded products are not FDA approved and are not interchangeable with brand products.

This calculator is an arithmetic aid for medication a licensed prescriber has already prescribed. It does not recommend a dose. Confirm any result with your prescriber or pharmacist before use.

Sources

Read before you use it

Guides for this calculator

Plan your first 12 weeks

Use the week-by-week planner: pick a start date and the label schedule your prescriber is following, get a dated calendar of every injection, every step up and the steady-state points, with what the label and the trials say about each week, then export it.

Updated September 4, 2026

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